Evaluation of Flood Control Performance in the Talangsari Watershed, Samarinda, East Kalimantan

Joko Sugeng Hariyadi, Department of Civil and Environmental Engineering, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
Istiarto Istiarto, Department of Civil and Environmental Engineering, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
Adam Pamudji Raharjo, Department of Civil and Environmental Engineering, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia


The flood issues in the Talangsari River in Samarinda City were not only caused by high rainfall but also by the significant sediment accumulation and waste along the river, the encroachment of residential areas onto the river section, and the lack of public awareness regarding environmental cleanliness. As a result, flooding occurs throughout the Talangsari River, from upstream to downstream, indicating significant damage to the river. Considering these issues, proactive measures are necessary to address the flood problems. One such measure is the normalization of the Talangsari River to ensure smooth land transportation from and to Apt Pranoto Airport in the Sei Siring area, Bontang City, Sangatta, and Kutai Kartanegara. The flood discharge plan was estimated using Nakayasu and SCS synthetic unit hydrograph method. The analysis revealed a peak discharge of 6.39 m3/s for the existing conditions (2-year return period) and 13.38 m3/s for the normalization conditions (25-year return period). Subsequently, the simulations were performed using the HEC-RAS program by two scenarios: the existing river condition and the normalization scenarios. Following the simulation with the 2-year return period discharge for the existing conditions, the Talangsari River experienced upstream to downstream flooding, underscoring the need for flood mitigation measures. The river normalization simulation using the 25-year return period discharge considered dimensions such as a channel width of 7m and a depth of 3.5m. As a result of the normalization simulation, the Talangsari River successfully accommodated a flow of 13.38 m3/s without experiencing flooding, confirming that the decision to pursue normalization was the best choice.


river; flood; Flood control; Normalization; HEC-RAS; Talangsari River

Full Text:



Peraturan Pemerintah Republik Indonesia Nomor 38 Tahun 2011 Tentang Sungai. 2011.

J. Mantik, A. Mutiara Dimaputri, F. Risyadi, and G. Nur Putra Pratama, “Flood Management Strategy in Samarinda City, East Kalimantan Province,” 2022.

V. , T. Chow, Applied Hydrology. New York: McGraw-Hill, 1988.

D. Luknanto, “Analisis Frekuensi.” Yogyakarta, 2012.

Istiarto, Modul Pelatihan Pemakaian HEC-RAS. Yogyakarta, 2014.

R. Benny Sukmara and R. Shyan Wu, “The 20 th Cross-strait Symposium on Environment, Resources and Ecological Conservation 印度尼西亞三馬林達的洪水管理:最新進展 Flood Management in Samarinda, Indonesia: Recent Progress,” 2021, doi: 10.20944/preprints202102.0524.v1.

R. J. Kodoatie, Rekayasa dan manajemen banjir kota. 2013.

A. Junaidi, N. Nurhamidah, and D. Daoed, “Future flood management strategies in Indonesia,” in MATEC Web of Conferences, EDP Sciences, Nov. 2018. doi: 10.1051/matecconf/201822901014.

B. Triatmodjo, Hidrologi Terapan. Yogyakarta: Beta Offset, 2019.

BMKG, “Curah Hujan,” BMKG, 2022. https://dataonline.bmkg.go.id/home (accessed Jan. 15, 2022).

S. Harto, Hidrologi Teori, Masalah, dan Penyelesaian. Yogyakarta: Nafiri Offset, 2009.

JAXA Global Rainfall Watch, “JAXA Global Rainfall Watch (GSMaP) ,” JAXA, 2022. https://sharaku.eorc.jaxa.jp/GSMaP/index.htm (accessed Jan. 15, 2022).

TRMM / GPM / GSMaP, “How about using rain data?” [Online]. Available: http://sharaku.eorc.jaxa.jp/GSMaP/index_e.htm

Learn Culvert Studio, “Manning’s n-values,” Learn Culvert Studio, 2022. hydrologystudio.com (accessed Apr. 01, 2022).

M. Syahrin, G. Rukmana, D. Rachman, A. Harakan, and F. Tadjine, “Sister city bottom up collaborative model plan as a major flooding mitigation in Samarinda,” European Alliance for Innovation n.o., Jun. 2019. doi: 10.4108/eai.8-12-2018.2284017.

DOI: https://doi.org/10.21831/inersia.v19i1.54144


  • There are currently no refbacks.

Copyright (c) 2023 Joko Sugeng Hariyadi

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.


Publisher:                   Co-Publisher:

Indexed by:

Supported by:
Jurnal Ilmiah Magister Managemen

Social Media:

 Online (e-ISSN): 2528-388X  || Printed (p-ISSN): 0216-762X

Lisensi Creative Commons
INERSIA by https://journal.uny.ac.id/index.php/inersia/index was distributed under a Creative Commons Attribution 4.0 International License.